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authorAshok Nagarajan <ashok@cozybit.com>2013-05-10 17:50:51 -0700
committerJohannes Berg <johannes.berg@intel.com>2013-05-24 23:54:43 +0200
commitb422c6cd7e93bb613030f14d7d8a0cc73f115629 (patch)
treed27418a219e0c4809bee0e73c5117da8095ad01a /net/wireless/util.c
parentd4a5a48976d12ab340ed34605b5f5049b123d868 (diff)
downloadlinux-stericsson-b422c6cd7e93bb613030f14d7d8a0cc73f115629.tar.gz
{cfg,mac}80211: move mandatory rates calculation to cfg80211
Move mandatory rates calculation to cfg80211, shared with non mac80211 drivers. Signed-off-by: Ashok Nagarajan <ashok@cozybit.com> [extend documentation] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless/util.c')
-rw-r--r--net/wireless/util.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/net/wireless/util.c b/net/wireless/util.c
index b11052be09be..0962f107f57f 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -33,6 +33,29 @@ ieee80211_get_response_rate(struct ieee80211_supported_band *sband,
}
EXPORT_SYMBOL(ieee80211_get_response_rate);
+u32 ieee80211_mandatory_rates(struct ieee80211_supported_band *sband)
+{
+ struct ieee80211_rate *bitrates;
+ u32 mandatory_rates = 0;
+ enum ieee80211_rate_flags mandatory_flag;
+ int i;
+
+ if (WARN_ON(!sband))
+ return 1;
+
+ if (sband->band == IEEE80211_BAND_2GHZ)
+ mandatory_flag = IEEE80211_RATE_MANDATORY_B;
+ else
+ mandatory_flag = IEEE80211_RATE_MANDATORY_A;
+
+ bitrates = sband->bitrates;
+ for (i = 0; i < sband->n_bitrates; i++)
+ if (bitrates[i].flags & mandatory_flag)
+ mandatory_rates |= BIT(i);
+ return mandatory_rates;
+}
+EXPORT_SYMBOL(ieee80211_mandatory_rates);
+
int ieee80211_channel_to_frequency(int chan, enum ieee80211_band band)
{
/* see 802.11 17.3.8.3.2 and Annex J